Commit | Line | Data |
---|---|---|
e576be50 | 1 | /* |
2 | * types.c | |
3 | * - RR-type-specific code, and the machinery to call it | |
4 | */ | |
5 | /* | |
ae8cc977 | 6 | * This file is part of adns, which is |
7 | * Copyright (C) 1997-2000,2003,2006 Ian Jackson | |
8 | * Copyright (C) 1999-2000,2003,2006 Tony Finch | |
9 | * Copyright (C) 1991 Massachusetts Institute of Technology | |
10 | * (See the file INSTALL for full details.) | |
e576be50 | 11 | * |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software Foundation, | |
24 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
25 | */ | |
98a3f706 | 26 | |
1b644113 | 27 | #include <stdlib.h> |
28 | ||
0f091044 | 29 | #include <sys/types.h> |
71a6ff46 | 30 | #include <sys/socket.h> |
31 | #include <netinet/in.h> | |
86e7b8d9 | 32 | #include <arpa/inet.h> |
33 | ||
98a3f706 | 34 | #include "internal.h" |
35 | ||
609133ee | 36 | #define R_NOMEM return adns_s_nomemory |
37 | #define CSP_ADDSTR(s) do { \ | |
38 | if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; \ | |
39 | } while (0) | |
1dfe95d8 | 40 | |
eb81d633 | 41 | /* |
42 | * order of sections: | |
43 | * | |
9ec44266 | 44 | * _string (pap) |
eb81d633 | 45 | * _textdata, _qstring (csp) |
46 | * _str (mf,cs) | |
9ec44266 | 47 | * _intstr (mf,csp,cs) |
eb81d633 | 48 | * _manyistr (mf,cs) |
49 | * _txt (pa) | |
f930c455 MW |
50 | * _inaddr (pa,di,cs +search_sortlist, dip_genaddr) |
51 | * _addr (pa,di,div,csp,cs,gsz | |
52 | * +search_sortlist_sa, dip_sockaddr) | |
382b81f7 MW |
53 | * _domain (pap,csp,cs) |
54 | * _dom_raw (pa) | |
eb81d633 | 55 | * _host_raw (pa) |
382b81f7 MW |
56 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs |
57 | * +pap_findaddrs, icb_hostaddr) | |
eb81d633 | 58 | * _mx_raw (pa,di) |
59 | * _mx (pa,di) | |
60 | * _inthostaddr (mf,cs) | |
382b81f7 | 61 | * _inthost (cs) |
938b0228 | 62 | * _ptr (ckl,pa +icb_ptr) |
382b81f7 MW |
63 | * _strpair (mf) |
64 | * _intstrpair (mf) | |
9ec44266 | 65 | * _hinfo (pa) |
382b81f7 MW |
66 | * _mailbox (pap,csp +pap_mailbox822) |
67 | * _rp (pa,cs) | |
9ec44266 | 68 | * _soa (pa,mf,cs) |
e8e5aeac | 69 | * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort) |
2c6eb096 | 70 | * _byteblock (mf) |
71 | * _opaque (pa,cs) | |
eb81d633 | 72 | * _flat (mf) |
73 | * | |
74 | * within each section: | |
e8e5aeac | 75 | * ckl_* |
eb81d633 | 76 | * pap_* |
77 | * pa_* | |
78 | * dip_* | |
79 | * di_* | |
80 | * mfp_* | |
81 | * mf_* | |
82 | * csp_* | |
83 | * cs_* | |
b0a32b17 | 84 | * gsz_* |
d24e2a7e | 85 | * postsort_* |
eb81d633 | 86 | */ |
87 | ||
88 | /* | |
b365d68a | 89 | * _qstring (pap,csp) |
eb81d633 | 90 | */ |
91 | ||
b365d68a | 92 | static adns_status pap_qstring(const parseinfo *pai, int *cbyte_io, int max, |
9ec44266 | 93 | int *len_r, char **str_r) { |
94 | /* Neither len_r nor str_r may be null. | |
95 | * End of datagram (overrun) is indicated by returning adns_s_invaliddata; | |
96 | */ | |
97 | const byte *dgram= pai->dgram; | |
98 | int l, cbyte; | |
99 | char *str; | |
100 | ||
101 | cbyte= *cbyte_io; | |
102 | ||
103 | if (cbyte >= max) return adns_s_invaliddata; | |
104 | GET_B(cbyte,l); | |
105 | if (cbyte+l > max) return adns_s_invaliddata; | |
106 | ||
107 | str= adns__alloc_interim(pai->qu, l+1); | |
108 | if (!str) R_NOMEM; | |
109 | ||
110 | str[l]= 0; | |
111 | memcpy(str,dgram+cbyte,l); | |
112 | ||
113 | *len_r= l; | |
114 | *str_r= str; | |
115 | *cbyte_io= cbyte+l; | |
116 | ||
117 | return adns_s_ok; | |
118 | } | |
119 | ||
b365d68a | 120 | static adns_status csp_qstring(vbuf *vb, const char *dp, int len) { |
eb81d633 | 121 | unsigned char ch; |
122 | char buf[10]; | |
123 | int cn; | |
124 | ||
125 | CSP_ADDSTR("\""); | |
126 | for (cn=0; cn<len; cn++) { | |
127 | ch= *dp++; | |
b365d68a | 128 | if (ch == '\\') { |
9ec44266 | 129 | CSP_ADDSTR("\\\\"); |
b365d68a | 130 | } else if (ch == '"') { |
131 | CSP_ADDSTR("\\\""); | |
132 | } else if (ch >= 32 && ch <= 126) { | |
133 | if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM; | |
eb81d633 | 134 | } else { |
9ec44266 | 135 | sprintf(buf,"\\x%02x",ch); |
eb81d633 | 136 | CSP_ADDSTR(buf); |
137 | } | |
138 | } | |
139 | CSP_ADDSTR("\""); | |
140 | ||
141 | return adns_s_ok; | |
142 | } | |
143 | ||
eb81d633 | 144 | /* |
b365d68a | 145 | * _str (mf) |
eb81d633 | 146 | */ |
147 | ||
148 | static void mf_str(adns_query qu, void *datap) { | |
149 | char **rrp= datap; | |
150 | ||
151 | adns__makefinal_str(qu,rrp); | |
152 | } | |
153 | ||
eb81d633 | 154 | /* |
b365d68a | 155 | * _intstr (mf) |
eb81d633 | 156 | */ |
157 | ||
158 | static void mf_intstr(adns_query qu, void *datap) { | |
159 | adns_rr_intstr *rrp= datap; | |
160 | ||
161 | adns__makefinal_str(qu,&rrp->str); | |
162 | } | |
163 | ||
eb81d633 | 164 | /* |
b365d68a | 165 | * _manyistr (mf) |
eb81d633 | 166 | */ |
167 | ||
168 | static void mf_manyistr(adns_query qu, void *datap) { | |
169 | adns_rr_intstr **rrp= datap; | |
170 | adns_rr_intstr *te, *table; | |
171 | void *tablev; | |
172 | int tc; | |
173 | ||
174 | for (tc=0, te= *rrp; te->i >= 0; te++, tc++); | |
175 | tablev= *rrp; | |
176 | adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1)); | |
177 | *rrp= table= tablev; | |
178 | for (te= *rrp; te->i >= 0; te++) | |
179 | adns__makefinal_str(qu,&te->str); | |
180 | } | |
181 | ||
eb81d633 | 182 | /* |
b365d68a | 183 | * _txt (pa,cs) |
eb81d633 | 184 | */ |
185 | ||
609133ee | 186 | static adns_status pa_txt(const parseinfo *pai, int cbyte, |
187 | int max, void *datap) { | |
eb81d633 | 188 | adns_rr_intstr **rrp= datap, *table, *te; |
189 | const byte *dgram= pai->dgram; | |
190 | int ti, tc, l, startbyte; | |
9ec44266 | 191 | adns_status st; |
eb81d633 | 192 | |
193 | startbyte= cbyte; | |
194 | if (cbyte >= max) return adns_s_invaliddata; | |
195 | tc= 0; | |
196 | while (cbyte < max) { | |
197 | GET_B(cbyte,l); | |
198 | cbyte+= l; | |
9ec44266 | 199 | tc++; |
eb81d633 | 200 | } |
b365d68a | 201 | if (cbyte != max || !tc) return adns_s_invaliddata; |
eb81d633 | 202 | |
203 | table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1)); | |
204 | if (!table) R_NOMEM; | |
205 | ||
206 | for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) { | |
b365d68a | 207 | st= pap_qstring(pai, &cbyte, max, &te->i, &te->str); |
9ec44266 | 208 | if (st) return st; |
eb81d633 | 209 | } |
210 | assert(cbyte == max); | |
211 | ||
212 | te->i= -1; | |
213 | te->str= 0; | |
214 | ||
215 | *rrp= table; | |
216 | return adns_s_ok; | |
828d89bd | 217 | } |
218 | ||
b365d68a | 219 | static adns_status cs_txt(vbuf *vb, const void *datap) { |
220 | const adns_rr_intstr *const *rrp= datap; | |
221 | const adns_rr_intstr *current; | |
222 | adns_status st; | |
223 | int spc; | |
224 | ||
225 | for (current= *rrp, spc=0; current->i >= 0; current++, spc=1) { | |
226 | if (spc) CSP_ADDSTR(" "); | |
227 | st= csp_qstring(vb,current->str,current->i); if (st) return st; | |
228 | } | |
229 | return adns_s_ok; | |
230 | } | |
231 | ||
232 | /* | |
233 | * _hinfo (cs) | |
234 | */ | |
235 | ||
236 | static adns_status cs_hinfo(vbuf *vb, const void *datap) { | |
237 | const adns_rr_intstrpair *rrp= datap; | |
238 | adns_status st; | |
239 | ||
240 | st= csp_qstring(vb,rrp->array[0].str,rrp->array[0].i); if (st) return st; | |
241 | CSP_ADDSTR(" "); | |
242 | st= csp_qstring(vb,rrp->array[1].str,rrp->array[1].i); if (st) return st; | |
243 | return adns_s_ok; | |
244 | } | |
245 | ||
eb81d633 | 246 | /* |
f930c455 | 247 | * _inaddr (pa,di,cs +search_sortlist, dip_genaddr) |
eb81d633 | 248 | */ |
249 | ||
609133ee | 250 | static adns_status pa_inaddr(const parseinfo *pai, int cbyte, |
251 | int max, void *datap) { | |
e062dcae | 252 | struct in_addr *storeto= datap; |
e7a9ca47 | 253 | |
254 | if (max-cbyte != 4) return adns_s_invaliddata; | |
1dfe95d8 | 255 | memcpy(storeto, pai->dgram + cbyte, 4); |
e7a9ca47 | 256 | return adns_s_ok; |
257 | } | |
258 | ||
f930c455 | 259 | static int search_sortlist(adns_state ads, int af, const void *ad) { |
09957b1c | 260 | const struct sortlist *slp; |
261 | int i; | |
262 | ||
263 | for (i=0, slp=ads->sortlist; | |
609133ee | 264 | i<ads->nsortlist && |
07554ccd | 265 | !adns__addr_match_p(af,ad, slp->af,&slp->base,&slp->mask); |
09957b1c | 266 | i++, slp++); |
267 | return i; | |
eb81d633 | 268 | } |
269 | ||
f930c455 | 270 | static int dip_genaddr(adns_state ads, int af, const void *a, const void *b) { |
09957b1c | 271 | int ai, bi; |
272 | ||
273 | if (!ads->nsortlist) return 0; | |
274 | ||
f930c455 MW |
275 | ai= search_sortlist(ads,af,a); |
276 | bi= search_sortlist(ads,af,b); | |
09957b1c | 277 | return bi<ai; |
278 | } | |
279 | ||
609133ee | 280 | static int di_inaddr(adns_state ads, |
281 | const void *datap_a, const void *datap_b) { | |
f930c455 | 282 | return dip_genaddr(ads,AF_INET,datap_a,datap_b); |
e062dcae | 283 | } |
284 | ||
285 | static adns_status cs_inaddr(vbuf *vb, const void *datap) { | |
286 | const struct in_addr *rrp= datap, rr= *rrp; | |
86e7b8d9 | 287 | const char *ia; |
288 | ||
e062dcae | 289 | ia= inet_ntoa(rr); assert(ia); |
1dfe95d8 | 290 | CSP_ADDSTR(ia); |
291 | return adns_s_ok; | |
86e7b8d9 | 292 | } |
e7a9ca47 | 293 | |
eb81d633 | 294 | /* |
f930c455 | 295 | * _addr (pa,di,div,csp,cs,gsz +search_sortlist_sa, dip_sockaddr) |
eb81d633 | 296 | */ |
297 | ||
609133ee | 298 | static adns_status pa_addr(const parseinfo *pai, int cbyte, |
299 | int max, void *datap) { | |
551ff40f | 300 | adns_rr_addr *storeto= datap; |
1dfe95d8 | 301 | const byte *dgram= pai->dgram; |
c7836bc9 | 302 | |
828d89bd | 303 | if (max-cbyte != 4) return adns_s_invaliddata; |
304 | storeto->len= sizeof(storeto->addr.inet); | |
305 | memset(&storeto->addr,0,sizeof(storeto->addr.inet)); | |
306 | storeto->addr.inet.sin_family= AF_INET; | |
828d89bd | 307 | memcpy(&storeto->addr.inet.sin_addr,dgram+cbyte,4); |
308 | return adns_s_ok; | |
309 | } | |
310 | ||
f930c455 | 311 | static int search_sortlist_sa(adns_state ads, const struct sockaddr *sa) { |
07554ccd MW |
312 | union gen_addr a; |
313 | adns__sockaddr_extract(sa, &a, 0); | |
314 | return search_sortlist(ads, sa->sa_family, &a); | |
f930c455 | 315 | } |
07554ccd | 316 | |
f930c455 MW |
317 | static int dip_sockaddr(adns_state ads, |
318 | const struct sockaddr *sa, | |
319 | const struct sockaddr *sb) { | |
320 | if (!ads->sortlist) return 0; | |
321 | return search_sortlist_sa(ads, sa) > search_sortlist_sa(ads, sb); | |
322 | } | |
323 | ||
09957b1c | 324 | static int di_addr(adns_state ads, const void *datap_a, const void *datap_b) { |
551ff40f | 325 | const adns_rr_addr *ap= datap_a, *bp= datap_b; |
f930c455 | 326 | return dip_sockaddr(ads, &ap->addr.sa, &bp->addr.sa); |
828d89bd | 327 | } |
328 | ||
09957b1c | 329 | static int div_addr(void *context, const void *datap_a, const void *datap_b) { |
330 | const adns_state ads= context; | |
331 | ||
332 | return di_addr(ads, datap_a, datap_b); | |
333 | } | |
334 | ||
551ff40f | 335 | static adns_status csp_addr(vbuf *vb, const adns_rr_addr *rrp) { |
828d89bd | 336 | const char *ia; |
47a6797e | 337 | char buf[30]; |
828d89bd | 338 | |
339 | switch (rrp->addr.inet.sin_family) { | |
340 | case AF_INET: | |
b365d68a | 341 | CSP_ADDSTR("INET "); |
828d89bd | 342 | ia= inet_ntoa(rrp->addr.inet.sin_addr); assert(ia); |
1dfe95d8 | 343 | CSP_ADDSTR(ia); |
828d89bd | 344 | break; |
345 | default: | |
346 | sprintf(buf,"AF=%u",rrp->addr.sa.sa_family); | |
1dfe95d8 | 347 | CSP_ADDSTR(buf); |
828d89bd | 348 | break; |
349 | } | |
350 | return adns_s_ok; | |
351 | } | |
352 | ||
1dfe95d8 | 353 | static adns_status cs_addr(vbuf *vb, const void *datap) { |
551ff40f | 354 | const adns_rr_addr *rrp= datap; |
1dfe95d8 | 355 | |
356 | return csp_addr(vb,rrp); | |
357 | } | |
358 | ||
b0a32b17 MW |
359 | static int gsz_addr(const typeinfo *typei, adns_rrtype type) { |
360 | return type & adns__qtf_bigaddr ? | |
361 | sizeof(adns_rr_addr) : sizeof(adns_rr_addr_v4only); | |
362 | } | |
363 | ||
eb81d633 | 364 | /* |
b365d68a | 365 | * _domain (pap,csp,cs) |
366 | * _dom_raw (pa) | |
eb81d633 | 367 | */ |
368 | ||
1dfe95d8 | 369 | static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max, |
370 | char **domain_r, parsedomain_flags flags) { | |
e062dcae | 371 | adns_status st; |
372 | char *dm; | |
373 | ||
1dfe95d8 | 374 | st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags, |
375 | pai->dgram,pai->dglen, cbyte_io, max); | |
e062dcae | 376 | if (st) return st; |
1dfe95d8 | 377 | if (!pai->qu->vb.used) return adns_s_invaliddata; |
e062dcae | 378 | |
1dfe95d8 | 379 | dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1); |
380 | if (!dm) R_NOMEM; | |
e062dcae | 381 | |
1dfe95d8 | 382 | dm[pai->qu->vb.used]= 0; |
383 | memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used); | |
e062dcae | 384 | |
385 | *domain_r= dm; | |
386 | return adns_s_ok; | |
387 | } | |
388 | ||
b365d68a | 389 | static adns_status csp_domain(vbuf *vb, const char *domain) { |
390 | CSP_ADDSTR(domain); | |
391 | if (!*domain) CSP_ADDSTR("."); | |
392 | return adns_s_ok; | |
393 | } | |
394 | ||
395 | static adns_status cs_domain(vbuf *vb, const void *datap) { | |
396 | const char *const *domainp= datap; | |
397 | return csp_domain(vb,*domainp); | |
398 | } | |
399 | ||
609133ee | 400 | static adns_status pa_dom_raw(const parseinfo *pai, int cbyte, |
401 | int max, void *datap) { | |
b365d68a | 402 | char **rrp= datap; |
403 | adns_status st; | |
404 | ||
405 | st= pap_domain(pai, &cbyte, max, rrp, pdf_quoteok); | |
406 | if (st) return st; | |
407 | ||
408 | if (cbyte != max) return adns_s_invaliddata; | |
409 | return adns_s_ok; | |
410 | } | |
411 | ||
eb81d633 | 412 | /* |
413 | * _host_raw (pa) | |
414 | */ | |
415 | ||
609133ee | 416 | static adns_status pa_host_raw(const parseinfo *pai, int cbyte, |
417 | int max, void *datap) { | |
e062dcae | 418 | char **rrp= datap; |
ffbda80c | 419 | adns_status st; |
86e7b8d9 | 420 | |
1dfe95d8 | 421 | st= pap_domain(pai, &cbyte, max, rrp, |
422 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
e062dcae | 423 | if (st) return st; |
424 | ||
425 | if (cbyte != max) return adns_s_invaliddata; | |
426 | return adns_s_ok; | |
427 | } | |
ffbda80c | 428 | |
eb81d633 | 429 | /* |
382b81f7 | 430 | * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs, icb_hostaddr) |
eb81d633 | 431 | */ |
c7836bc9 | 432 | |
1dfe95d8 | 433 | static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha, |
b0a32b17 | 434 | size_t addrsz, |
1dfe95d8 | 435 | int *cbyte_io, int count, int dmstart) { |
436 | int rri, naddrs; | |
c7836bc9 | 437 | int type, class, rdlen, rdstart, ownermatched; |
73dba56e | 438 | unsigned long ttl; |
1dfe95d8 | 439 | adns_status st; |
c7836bc9 | 440 | |
1dfe95d8 | 441 | for (rri=0, naddrs=-1; rri<count; rri++) { |
609133ee | 442 | st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram, |
443 | pai->dglen, cbyte_io, | |
73dba56e | 444 | &type, &class, &ttl, &rdlen, &rdstart, |
1dfe95d8 | 445 | pai->dgram, pai->dglen, dmstart, &ownermatched); |
c7836bc9 | 446 | if (st) return st; |
1dfe95d8 | 447 | if (!ownermatched || class != DNS_CLASS_IN || type != adns_r_a) { |
448 | if (naddrs>0) break; else continue; | |
449 | } | |
450 | if (naddrs == -1) { | |
451 | naddrs= 0; | |
c7836bc9 | 452 | } |
b0a32b17 | 453 | if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*addrsz)) |
609133ee | 454 | R_NOMEM; |
73dba56e | 455 | adns__update_expires(pai->qu,ttl,pai->now); |
b0a32b17 | 456 | st= pa_addr(pai, rdstart,rdstart+rdlen, pai->qu->vb.buf + naddrs*addrsz); |
c7836bc9 | 457 | if (st) return st; |
1dfe95d8 | 458 | naddrs++; |
c7836bc9 | 459 | } |
1dfe95d8 | 460 | if (naddrs >= 0) { |
b0a32b17 | 461 | ha->addrs= adns__alloc_interim(pai->qu, naddrs*addrsz); |
1dfe95d8 | 462 | if (!ha->addrs) R_NOMEM; |
b0a32b17 | 463 | memcpy(ha->addrs, pai->qu->vb.buf, naddrs*addrsz); |
1dfe95d8 | 464 | ha->naddrs= naddrs; |
c7836bc9 | 465 | ha->astatus= adns_s_ok; |
1dfe95d8 | 466 | |
b0a32b17 | 467 | adns__isort(ha->addrs, naddrs, addrsz, pai->qu->vb.buf, |
09957b1c | 468 | div_addr, pai->ads); |
c7836bc9 | 469 | } |
470 | return adns_s_ok; | |
471 | } | |
472 | ||
551ff40f | 473 | static void icb_hostaddr(adns_query parent, adns_query child) { |
551ff40f | 474 | adns_answer *cans= child->answer; |
0ea82d76 | 475 | adns_rr_hostaddr *rrp= child->ctx.pinfo.hostaddr; |
4218fb9a | 476 | adns_state ads= parent->ads; |
b365d68a | 477 | adns_status st; |
b0a32b17 | 478 | size_t addrsz= gsz_addr(0, parent->answer->type); |
551ff40f | 479 | |
b365d68a | 480 | st= cans->status; |
481 | rrp->astatus= st; | |
482 | rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : cans->nrrs; | |
551ff40f | 483 | rrp->addrs= cans->rrs.addr; |
b0a32b17 | 484 | adns__transfer_interim(child, parent, rrp->addrs, rrp->naddrs*addrsz); |
a6536d8b | 485 | |
4218fb9a | 486 | if (parent->children.head) { |
487 | LIST_LINK_TAIL(ads->childw,parent); | |
488 | } else { | |
489 | adns__query_done(parent); | |
490 | } | |
551ff40f | 491 | } |
492 | ||
1dfe95d8 | 493 | static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io, |
494 | int max, adns_rr_hostaddr *rrp) { | |
c7836bc9 | 495 | adns_status st; |
496 | int dmstart, cbyte; | |
7da21070 | 497 | qcontext ctx; |
498 | int id; | |
499 | adns_query nqu; | |
4b707d8b | 500 | adns_queryflags nflags; |
b0a32b17 | 501 | size_t addrsz= gsz_addr(0, pai->qu->answer->type); |
c7836bc9 | 502 | |
503 | dmstart= cbyte= *cbyte_io; | |
1dfe95d8 | 504 | st= pap_domain(pai, &cbyte, max, &rrp->host, |
505 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
c7836bc9 | 506 | if (st) return st; |
507 | *cbyte_io= cbyte; | |
508 | ||
509 | rrp->astatus= adns_s_ok; | |
510 | rrp->naddrs= -1; | |
511 | rrp->addrs= 0; | |
512 | ||
1dfe95d8 | 513 | cbyte= pai->nsstart; |
c7836bc9 | 514 | |
b0a32b17 | 515 | st= pap_findaddrs(pai, rrp,addrsz, &cbyte, pai->nscount, dmstart); |
c7836bc9 | 516 | if (st) return st; |
517 | if (rrp->naddrs != -1) return adns_s_ok; | |
518 | ||
b0a32b17 | 519 | st= pap_findaddrs(pai, rrp,addrsz, &cbyte, pai->arcount, dmstart); |
c7836bc9 | 520 | if (st) return st; |
521 | if (rrp->naddrs != -1) return adns_s_ok; | |
1dfe95d8 | 522 | |
7da21070 | 523 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
524 | pai->dgram, pai->dglen, dmstart, | |
525 | adns_r_addr, adns_qf_quoteok_query); | |
526 | if (st) return st; | |
551ff40f | 527 | |
a6536d8b | 528 | ctx.ext= 0; |
529 | ctx.callback= icb_hostaddr; | |
0ea82d76 MW |
530 | ctx.pinfo.hostaddr= rrp; |
531 | memset(&ctx.tinfo, 0, sizeof(ctx.tinfo)); | |
4b707d8b | 532 | |
533 | nflags= adns_qf_quoteok_query; | |
534 | if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid; | |
535 | ||
7da21070 | 536 | st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr), |
7f593711 MW |
537 | ((adns_r_addr & adns_rrt_reprmask) | |
538 | (pai->qu->answer->type & ~adns_rrt_reprmask)), | |
660d7d3b | 539 | &pai->qu->vb, id, nflags, pai->now, &ctx); |
7da21070 | 540 | if (st) return st; |
541 | ||
542 | nqu->parent= pai->qu; | |
543 | LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.); | |
1dfe95d8 | 544 | |
545 | return adns_s_ok; | |
c7836bc9 | 546 | } |
547 | ||
609133ee | 548 | static adns_status pa_hostaddr(const parseinfo *pai, int cbyte, |
549 | int max, void *datap) { | |
1dfe95d8 | 550 | adns_rr_hostaddr *rrp= datap; |
c7836bc9 | 551 | adns_status st; |
c7836bc9 | 552 | |
1dfe95d8 | 553 | st= pap_hostaddr(pai, &cbyte, max, rrp); |
c7836bc9 | 554 | if (st) return st; |
555 | if (cbyte != max) return adns_s_invaliddata; | |
556 | ||
1dfe95d8 | 557 | return adns_s_ok; |
558 | } | |
c7836bc9 | 559 | |
609133ee | 560 | static int dip_hostaddr(adns_state ads, |
561 | const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) { | |
1dfe95d8 | 562 | if (ap->astatus != bp->astatus) return ap->astatus; |
563 | if (ap->astatus) return 0; | |
c7836bc9 | 564 | |
f930c455 | 565 | return dip_sockaddr(ads, &ap->addrs[0].addr.sa, &bp->addrs[0].addr.sa); |
1dfe95d8 | 566 | } |
567 | ||
609133ee | 568 | static int di_hostaddr(adns_state ads, |
569 | const void *datap_a, const void *datap_b) { | |
1dfe95d8 | 570 | const adns_rr_hostaddr *ap= datap_a, *bp= datap_b; |
571 | ||
09957b1c | 572 | return dip_hostaddr(ads, ap,bp); |
c7836bc9 | 573 | } |
574 | ||
eb81d633 | 575 | static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) { |
576 | void *tablev; | |
b0a32b17 | 577 | size_t addrsz= gsz_addr(0, qu->answer->type); |
e062dcae | 578 | |
eb81d633 | 579 | adns__makefinal_str(qu,&rrp->host); |
580 | tablev= rrp->addrs; | |
b0a32b17 | 581 | adns__makefinal_block(qu, &tablev, rrp->naddrs*addrsz); |
eb81d633 | 582 | rrp->addrs= tablev; |
e062dcae | 583 | } |
584 | ||
eb81d633 | 585 | static void mf_hostaddr(adns_query qu, void *datap) { |
586 | adns_rr_hostaddr *rrp= datap; | |
e062dcae | 587 | |
eb81d633 | 588 | mfp_hostaddr(qu,rrp); |
e062dcae | 589 | } |
590 | ||
1dfe95d8 | 591 | static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) { |
a6f1dc92 | 592 | const char *errstr; |
1dfe95d8 | 593 | adns_status st; |
ac77ffc1 | 594 | char buf[20]; |
1dfe95d8 | 595 | int i; |
596 | ||
a6f1dc92 | 597 | st= csp_domain(vb,rrp->host); if (st) return st; |
1dfe95d8 | 598 | |
b365d68a | 599 | CSP_ADDSTR(" "); |
ac77ffc1 | 600 | CSP_ADDSTR(adns_errtypeabbrev(rrp->astatus)); |
601 | ||
602 | sprintf(buf," %d ",rrp->astatus); | |
603 | CSP_ADDSTR(buf); | |
a6f1dc92 | 604 | |
ac77ffc1 | 605 | CSP_ADDSTR(adns_errabbrev(rrp->astatus)); |
a6f1dc92 | 606 | CSP_ADDSTR(" "); |
ac77ffc1 | 607 | |
a6f1dc92 | 608 | errstr= adns_strerror(rrp->astatus); |
609 | st= csp_qstring(vb,errstr,strlen(errstr)); if (st) return st; | |
b365d68a | 610 | |
611 | if (rrp->naddrs >= 0) { | |
612 | CSP_ADDSTR(" ("); | |
613 | for (i=0; i<rrp->naddrs; i++) { | |
614 | CSP_ADDSTR(" "); | |
1dfe95d8 | 615 | st= csp_addr(vb,&rrp->addrs[i]); |
616 | } | |
b365d68a | 617 | CSP_ADDSTR(" )"); |
618 | } else { | |
619 | CSP_ADDSTR(" ?"); | |
1dfe95d8 | 620 | } |
621 | return adns_s_ok; | |
622 | } | |
623 | ||
624 | static adns_status cs_hostaddr(vbuf *vb, const void *datap) { | |
625 | const adns_rr_hostaddr *rrp= datap; | |
626 | ||
627 | return csp_hostaddr(vb,rrp); | |
628 | } | |
629 | ||
eb81d633 | 630 | /* |
631 | * _mx_raw (pa,di) | |
632 | */ | |
1dfe95d8 | 633 | |
609133ee | 634 | static adns_status pa_mx_raw(const parseinfo *pai, int cbyte, |
635 | int max, void *datap) { | |
eb81d633 | 636 | const byte *dgram= pai->dgram; |
637 | adns_rr_intstr *rrp= datap; | |
638 | adns_status st; | |
639 | int pref; | |
1dfe95d8 | 640 | |
eb81d633 | 641 | if (cbyte+2 > max) return adns_s_invaliddata; |
642 | GET_W(cbyte,pref); | |
643 | rrp->i= pref; | |
644 | st= pap_domain(pai, &cbyte, max, &rrp->str, | |
645 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
646 | if (st) return st; | |
1dfe95d8 | 647 | |
eb81d633 | 648 | if (cbyte != max) return adns_s_invaliddata; |
649 | return adns_s_ok; | |
650 | } | |
1dfe95d8 | 651 | |
09957b1c | 652 | static int di_mx_raw(adns_state ads, const void *datap_a, const void *datap_b) { |
eb81d633 | 653 | const adns_rr_intstr *ap= datap_a, *bp= datap_b; |
654 | ||
655 | if (ap->i < bp->i) return 0; | |
656 | if (ap->i > bp->i) return 1; | |
657 | return 0; | |
1dfe95d8 | 658 | } |
659 | ||
eb81d633 | 660 | /* |
661 | * _mx (pa,di) | |
662 | */ | |
1dfe95d8 | 663 | |
609133ee | 664 | static adns_status pa_mx(const parseinfo *pai, int cbyte, |
665 | int max, void *datap) { | |
eb81d633 | 666 | const byte *dgram= pai->dgram; |
667 | adns_rr_inthostaddr *rrp= datap; | |
668 | adns_status st; | |
669 | int pref; | |
670 | ||
671 | if (cbyte+2 > max) return adns_s_invaliddata; | |
672 | GET_W(cbyte,pref); | |
673 | rrp->i= pref; | |
674 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); | |
675 | if (st) return st; | |
676 | ||
677 | if (cbyte != max) return adns_s_invaliddata; | |
678 | return adns_s_ok; | |
679 | } | |
680 | ||
09957b1c | 681 | static int di_mx(adns_state ads, const void *datap_a, const void *datap_b) { |
eb81d633 | 682 | const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b; |
683 | ||
684 | if (ap->i < bp->i) return 0; | |
685 | if (ap->i > bp->i) return 1; | |
09957b1c | 686 | return dip_hostaddr(ads, &ap->ha, &bp->ha); |
1dfe95d8 | 687 | } |
688 | ||
eb81d633 | 689 | /* |
690 | * _inthostaddr (mf,cs) | |
691 | */ | |
692 | ||
1dfe95d8 | 693 | static void mf_inthostaddr(adns_query qu, void *datap) { |
694 | adns_rr_inthostaddr *rrp= datap; | |
695 | ||
696 | mfp_hostaddr(qu,&rrp->ha); | |
697 | } | |
698 | ||
eb81d633 | 699 | static adns_status cs_inthostaddr(vbuf *vb, const void *datap) { |
700 | const adns_rr_inthostaddr *rrp= datap; | |
701 | char buf[10]; | |
e062dcae | 702 | |
eb81d633 | 703 | sprintf(buf,"%u ",rrp->i); |
704 | CSP_ADDSTR(buf); | |
705 | ||
706 | return csp_hostaddr(vb,&rrp->ha); | |
ffbda80c | 707 | } |
708 | ||
eb81d633 | 709 | /* |
b365d68a | 710 | * _inthost (cs) |
711 | */ | |
712 | ||
713 | static adns_status cs_inthost(vbuf *vb, const void *datap) { | |
714 | const adns_rr_intstr *rrp= datap; | |
715 | char buf[10]; | |
716 | ||
717 | sprintf(buf,"%u ",rrp->i); | |
718 | CSP_ADDSTR(buf); | |
719 | return csp_domain(vb,rrp->str); | |
720 | } | |
721 | ||
722 | /* | |
938b0228 | 723 | * _ptr (ckl,pa +icb_ptr) |
a6536d8b | 724 | */ |
725 | ||
938b0228 MW |
726 | static adns_status ckl_ptr(adns_state ads, adns_queryflags flags, |
727 | union checklabel_state *cls, qcontext *ctx, | |
728 | int labnum, const char *label, int lablen) { | |
729 | static const char *const (expectdomain[])= { DNS_INADDR_ARPA }; | |
938b0228 MW |
730 | char *ep; |
731 | const char *ed; | |
732 | char labbuf[4]; | |
733 | int l; | |
734 | ||
735 | if (labnum < 4) { | |
736 | if (lablen<=0 || lablen>3) return adns_s_querydomainwrong; | |
737 | memcpy(labbuf, label, lablen); | |
738 | labbuf[lablen]= 0; | |
739 | cls->ptr.ipv[3-labnum]= strtoul(labbuf,&ep,10); | |
740 | if (*ep) return adns_s_querydomainwrong; | |
741 | if (lablen>1 && *label=='0') return adns_s_querydomainwrong; | |
742 | } else if (labnum < 4 + sizeof(expectdomain)/sizeof(*expectdomain)) { | |
743 | ed= expectdomain[labnum-4]; | |
744 | l= strlen(ed); | |
745 | if (lablen != l || memcmp(label, ed, l)) return adns_s_querydomainwrong; | |
746 | } else { | |
747 | if (lablen) return adns_s_querydomainwrong; | |
f930c455 MW |
748 | ctx->tinfo.ptr.addr.af= AF_INET; |
749 | ctx->tinfo.ptr.addr.addr.v4.s_addr= | |
938b0228 MW |
750 | htonl((cls->ptr.ipv[0]<<24) | (cls->ptr.ipv[1]<<16) | |
751 | (cls->ptr.ipv[2]<< 8) | (cls->ptr.ipv[3])); | |
752 | } | |
753 | return adns_s_ok; | |
754 | } | |
755 | ||
a6536d8b | 756 | static void icb_ptr(adns_query parent, adns_query child) { |
757 | adns_answer *cans= child->answer; | |
f930c455 | 758 | const struct af_addr *queried; |
ac5a2748 | 759 | const unsigned char *found; |
4218fb9a | 760 | adns_state ads= parent->ads; |
a6536d8b | 761 | int i; |
762 | ||
763 | if (cans->status == adns_s_nxdomain || cans->status == adns_s_nodata) { | |
764 | adns__query_fail(parent,adns_s_inconsistent); | |
765 | return; | |
766 | } else if (cans->status) { | |
767 | adns__query_fail(parent,cans->status); | |
768 | return; | |
769 | } | |
770 | ||
ac5a2748 | 771 | queried= &parent->ctx.tinfo.ptr.addr; |
f930c455 | 772 | assert(cans->type == adns_r_a); |
ac5a2748 | 773 | for (i=0, found=cans->rrs.bytes; i<cans->nrrs; i++, found+=cans->rrsz) { |
07554ccd | 774 | if (adns__genaddr_equal_p(queried->af,&queried->addr, AF_INET,found)) { |
4218fb9a | 775 | if (!parent->children.head) { |
776 | adns__query_done(parent); | |
777 | return; | |
778 | } else { | |
779 | LIST_LINK_TAIL(ads->childw,parent); | |
780 | return; | |
781 | } | |
a6536d8b | 782 | } |
783 | } | |
784 | ||
785 | adns__query_fail(parent,adns_s_inconsistent); | |
786 | } | |
787 | ||
609133ee | 788 | static adns_status pa_ptr(const parseinfo *pai, int dmstart, |
789 | int max, void *datap) { | |
a6536d8b | 790 | char **rrp= datap; |
791 | adns_status st; | |
938b0228 | 792 | int cbyte, id; |
a6536d8b | 793 | adns_query nqu; |
794 | qcontext ctx; | |
795 | ||
796 | cbyte= dmstart; | |
797 | st= pap_domain(pai, &cbyte, max, rrp, | |
798 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
799 | if (st) return st; | |
800 | if (cbyte != max) return adns_s_invaliddata; | |
801 | ||
a6536d8b | 802 | st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id, |
803 | pai->dgram, pai->dglen, dmstart, | |
ac5a2748 | 804 | adns_r_a, adns_qf_quoteok_query); |
a6536d8b | 805 | if (st) return st; |
806 | ||
807 | ctx.ext= 0; | |
808 | ctx.callback= icb_ptr; | |
0ea82d76 MW |
809 | memset(&ctx.pinfo,0,sizeof(ctx.pinfo)); |
810 | memset(&ctx.tinfo,0,sizeof(ctx.tinfo)); | |
ac5a2748 | 811 | st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_a), |
7f593711 MW |
812 | adns_r_a, &pai->qu->vb, id, adns_qf_quoteok_query, |
813 | pai->now, &ctx); | |
a6536d8b | 814 | if (st) return st; |
815 | ||
816 | nqu->parent= pai->qu; | |
817 | LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.); | |
a6536d8b | 818 | return adns_s_ok; |
819 | } | |
820 | ||
821 | /* | |
b365d68a | 822 | * _strpair (mf) |
9ec44266 | 823 | */ |
824 | ||
825 | static void mf_strpair(adns_query qu, void *datap) { | |
826 | adns_rr_strpair *rrp= datap; | |
827 | ||
828 | adns__makefinal_str(qu,&rrp->array[0]); | |
829 | adns__makefinal_str(qu,&rrp->array[1]); | |
830 | } | |
831 | ||
9ec44266 | 832 | /* |
b365d68a | 833 | * _intstrpair (mf) |
9ec44266 | 834 | */ |
835 | ||
836 | static void mf_intstrpair(adns_query qu, void *datap) { | |
837 | adns_rr_intstrpair *rrp= datap; | |
838 | ||
839 | adns__makefinal_str(qu,&rrp->array[0].str); | |
840 | adns__makefinal_str(qu,&rrp->array[1].str); | |
841 | } | |
842 | ||
9ec44266 | 843 | /* |
844 | * _hinfo (pa) | |
845 | */ | |
846 | ||
609133ee | 847 | static adns_status pa_hinfo(const parseinfo *pai, int cbyte, |
848 | int max, void *datap) { | |
9ec44266 | 849 | adns_rr_intstrpair *rrp= datap; |
850 | adns_status st; | |
851 | int i; | |
852 | ||
853 | for (i=0; i<2; i++) { | |
b365d68a | 854 | st= pap_qstring(pai, &cbyte, max, &rrp->array[i].i, &rrp->array[i].str); |
9ec44266 | 855 | if (st) return st; |
856 | } | |
857 | ||
858 | if (cbyte != max) return adns_s_invaliddata; | |
859 | ||
860 | return adns_s_ok; | |
861 | } | |
862 | ||
863 | /* | |
382b81f7 | 864 | * _mailbox (pap,cs +pap_mailbox822) |
9ec44266 | 865 | */ |
866 | ||
609133ee | 867 | static adns_status pap_mailbox822(const parseinfo *pai, |
868 | int *cbyte_io, int max, char **mb_r) { | |
eaa44731 | 869 | int lablen, labstart, i, needquote, c, r, neednorm; |
870 | const unsigned char *p; | |
871 | char *str; | |
872 | findlabel_state fls; | |
873 | adns_status st; | |
874 | vbuf *vb; | |
875 | ||
876 | vb= &pai->qu->vb; | |
877 | vb->used= 0; | |
878 | adns__findlabel_start(&fls, pai->ads, | |
879 | -1, pai->qu, | |
880 | pai->dgram, pai->dglen, max, | |
881 | *cbyte_io, cbyte_io); | |
882 | st= adns__findlabel_next(&fls,&lablen,&labstart); | |
883 | if (!lablen) { | |
b365d68a | 884 | adns__vbuf_appendstr(vb,"."); |
eaa44731 | 885 | goto x_ok; |
886 | } | |
887 | ||
888 | neednorm= 1; | |
889 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++) { | |
890 | c= *p++; | |
891 | if ((c&~128) < 32 || (c&~128) == 127) return adns_s_invaliddata; | |
892 | if (c == '.' && !neednorm) neednorm= 1; | |
7672a872 | 893 | else if (c==' ' || c>=127 || ctype_822special(c)) needquote++; |
eaa44731 | 894 | else neednorm= 0; |
895 | } | |
896 | ||
897 | if (needquote || neednorm) { | |
898 | r= adns__vbuf_ensure(vb, lablen+needquote+4); if (!r) R_NOMEM; | |
899 | adns__vbuf_appendq(vb,"\"",1); | |
900 | for (i=0, needquote=0, p= pai->dgram+labstart; i<lablen; i++, p++) { | |
901 | c= *p; | |
b365d68a | 902 | if (c == '"' || c=='\\') adns__vbuf_appendq(vb,"\\",1); |
eaa44731 | 903 | adns__vbuf_appendq(vb,p,1); |
904 | } | |
905 | adns__vbuf_appendq(vb,"\"",1); | |
906 | } else { | |
907 | r= adns__vbuf_append(vb, pai->dgram+labstart, lablen); if (!r) R_NOMEM; | |
908 | } | |
909 | ||
910 | r= adns__vbuf_appendstr(vb,"@"); if (!r) R_NOMEM; | |
911 | ||
912 | st= adns__parse_domain_more(&fls,pai->ads, pai->qu,vb,0, pai->dgram); | |
913 | if (st) return st; | |
914 | ||
915 | x_ok: | |
916 | str= adns__alloc_interim(pai->qu, vb->used+1); if (!str) R_NOMEM; | |
917 | memcpy(str,vb->buf,vb->used); | |
918 | str[vb->used]= 0; | |
919 | *mb_r= str; | |
920 | return adns_s_ok; | |
9ec44266 | 921 | } |
922 | ||
9da4a044 | 923 | static adns_status pap_mailbox(const parseinfo *pai, int *cbyte_io, int max, |
924 | char **mb_r) { | |
2c6eb096 | 925 | if (pai->qu->typei->typekey & adns__qtf_mail822) { |
9da4a044 | 926 | return pap_mailbox822(pai, cbyte_io, max, mb_r); |
927 | } else { | |
b365d68a | 928 | return pap_domain(pai, cbyte_io, max, mb_r, pdf_quoteok); |
9da4a044 | 929 | } |
930 | } | |
931 | ||
b365d68a | 932 | static adns_status csp_mailbox(vbuf *vb, const char *mailbox) { |
933 | return csp_domain(vb,mailbox); | |
934 | } | |
935 | ||
9ec44266 | 936 | /* |
b365d68a | 937 | * _rp (pa,cs) |
9ec44266 | 938 | */ |
939 | ||
609133ee | 940 | static adns_status pa_rp(const parseinfo *pai, int cbyte, |
941 | int max, void *datap) { | |
9ec44266 | 942 | adns_rr_strpair *rrp= datap; |
943 | adns_status st; | |
944 | ||
945 | st= pap_mailbox(pai, &cbyte, max, &rrp->array[0]); | |
946 | if (st) return st; | |
947 | ||
948 | st= pap_domain(pai, &cbyte, max, &rrp->array[1], pdf_quoteok); | |
949 | if (st) return st; | |
950 | ||
951 | if (cbyte != max) return adns_s_invaliddata; | |
952 | return adns_s_ok; | |
953 | } | |
954 | ||
b365d68a | 955 | static adns_status cs_rp(vbuf *vb, const void *datap) { |
956 | const adns_rr_strpair *rrp= datap; | |
957 | adns_status st; | |
958 | ||
959 | st= csp_mailbox(vb,rrp->array[0]); if (st) return st; | |
960 | CSP_ADDSTR(" "); | |
961 | st= csp_domain(vb,rrp->array[1]); if (st) return st; | |
962 | ||
963 | return adns_s_ok; | |
964 | } | |
965 | ||
9ec44266 | 966 | /* |
967 | * _soa (pa,mf,cs) | |
968 | */ | |
969 | ||
609133ee | 970 | static adns_status pa_soa(const parseinfo *pai, int cbyte, |
971 | int max, void *datap) { | |
9ec44266 | 972 | adns_rr_soa *rrp= datap; |
973 | const byte *dgram= pai->dgram; | |
974 | adns_status st; | |
975 | int msw, lsw, i; | |
976 | ||
977 | st= pap_domain(pai, &cbyte, max, &rrp->mname, | |
978 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
979 | if (st) return st; | |
980 | ||
981 | st= pap_mailbox(pai, &cbyte, max, &rrp->rname); | |
982 | if (st) return st; | |
983 | ||
984 | if (cbyte+20 != max) return adns_s_invaliddata; | |
985 | ||
986 | for (i=0; i<5; i++) { | |
987 | GET_W(cbyte,msw); | |
988 | GET_W(cbyte,lsw); | |
989 | (&rrp->serial)[i]= (msw<<16) | lsw; | |
990 | } | |
991 | ||
992 | return adns_s_ok; | |
993 | } | |
994 | ||
995 | static void mf_soa(adns_query qu, void *datap) { | |
996 | adns_rr_soa *rrp= datap; | |
997 | ||
998 | adns__makefinal_str(qu,&rrp->mname); | |
999 | adns__makefinal_str(qu,&rrp->rname); | |
1000 | } | |
1001 | ||
1002 | static adns_status cs_soa(vbuf *vb, const void *datap) { | |
1003 | const adns_rr_soa *rrp= datap; | |
1004 | char buf[20]; | |
1005 | int i; | |
1006 | adns_status st; | |
1007 | ||
b365d68a | 1008 | st= csp_domain(vb,rrp->mname); if (st) return st; |
9ec44266 | 1009 | CSP_ADDSTR(" "); |
b365d68a | 1010 | st= csp_mailbox(vb,rrp->rname); if (st) return st; |
9ec44266 | 1011 | |
1012 | for (i=0; i<5; i++) { | |
1013 | sprintf(buf," %lu",(&rrp->serial)[i]); | |
1014 | CSP_ADDSTR(buf); | |
1015 | } | |
1016 | ||
1017 | return adns_s_ok; | |
1018 | } | |
1019 | ||
1020 | /* | |
e8e5aeac | 1021 | * _srv* (ckl,(pap),pa*2,mf*2,di,(csp),cs*2,postsort) |
d19b03d0 | 1022 | */ |
1023 | ||
e8e5aeac MW |
1024 | static adns_status ckl_srv(adns_state ads, adns_queryflags flags, |
1025 | union checklabel_state *cls, qcontext *ctx, | |
1026 | int labnum, const char *label, int lablen) { | |
1027 | if (labnum < 2 && !(flags & adns_qf_quoteok_query)) { | |
1028 | if (!lablen || label[0] != '_') return adns_s_querydomaininvalid; | |
1029 | return adns_s_ok; | |
d19b03d0 | 1030 | } |
e8e5aeac | 1031 | return adns__ckl_hostname(ads, flags, cls, ctx, labnum, label, lablen); |
d19b03d0 | 1032 | } |
1033 | ||
05fc6b3a | 1034 | static adns_status pap_srv_begin(const parseinfo *pai, int *cbyte_io, int max, |
0e45654b | 1035 | adns_rr_srvha *rrp |
1036 | /* might be adns_rr_srvraw* */) { | |
401c256a | 1037 | const byte *dgram= pai->dgram; |
05fc6b3a | 1038 | int ti, cbyte; |
1039 | ||
1040 | cbyte= *cbyte_io; | |
1041 | if ((*cbyte_io += 6) > max) return adns_s_invaliddata; | |
401c256a | 1042 | |
1043 | rrp->priority= GET_W(cbyte, ti); | |
1044 | rrp->weight= GET_W(cbyte, ti); | |
1045 | rrp->port= GET_W(cbyte, ti); | |
1046 | return adns_s_ok; | |
1047 | } | |
1048 | ||
1049 | static adns_status pa_srvraw(const parseinfo *pai, int cbyte, | |
1050 | int max, void *datap) { | |
1051 | adns_rr_srvraw *rrp= datap; | |
1052 | adns_status st; | |
1053 | ||
05fc6b3a | 1054 | st= pap_srv_begin(pai,&cbyte,max,datap); |
401c256a | 1055 | if (st) return st; |
1056 | ||
1057 | st= pap_domain(pai, &cbyte, max, &rrp->host, | |
1058 | pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0); | |
1059 | if (st) return st; | |
1060 | ||
1061 | if (cbyte != max) return adns_s_invaliddata; | |
1062 | return adns_s_ok; | |
1063 | } | |
1064 | ||
1065 | static adns_status pa_srvha(const parseinfo *pai, int cbyte, | |
1066 | int max, void *datap) { | |
1067 | adns_rr_srvha *rrp= datap; | |
1068 | adns_status st; | |
1069 | ||
05fc6b3a | 1070 | st= pap_srv_begin(pai,&cbyte,max,datap); if (st) return st; |
401c256a | 1071 | st= pap_hostaddr(pai, &cbyte, max, &rrp->ha); if (st) return st; |
1072 | if (cbyte != max) return adns_s_invaliddata; | |
1073 | return adns_s_ok; | |
1074 | } | |
1075 | ||
1076 | static void mf_srvraw(adns_query qu, void *datap) { | |
1077 | adns_rr_srvraw *rrp= datap; | |
1078 | adns__makefinal_str(qu, &rrp->host); | |
1079 | } | |
1080 | ||
1081 | static void mf_srvha(adns_query qu, void *datap) { | |
1082 | adns_rr_srvha *rrp= datap; | |
1083 | mfp_hostaddr(qu,&rrp->ha); | |
1084 | } | |
1085 | ||
1086 | static int di_srv(adns_state ads, const void *datap_a, const void *datap_b) { | |
1087 | const adns_rr_srvraw *ap= datap_a, *bp= datap_b; | |
1088 | /* might be const adns_rr_svhostaddr* */ | |
1089 | ||
1090 | if (ap->priority < bp->priority) return 0; | |
1091 | if (ap->priority > bp->priority) return 1; | |
1092 | return 0; | |
1093 | } | |
1094 | ||
0e45654b | 1095 | static adns_status csp_srv_begin(vbuf *vb, const adns_rr_srvha *rrp |
1096 | /* might be adns_rr_srvraw* */) { | |
401c256a | 1097 | char buf[30]; |
1098 | sprintf(buf,"%u %u %u ", rrp->priority, rrp->weight, rrp->port); | |
1099 | CSP_ADDSTR(buf); | |
1100 | return adns_s_ok; | |
1101 | } | |
1102 | ||
1103 | static adns_status cs_srvraw(vbuf *vb, const void *datap) { | |
1104 | const adns_rr_srvraw *rrp= datap; | |
1105 | adns_status st; | |
1106 | ||
0e45654b | 1107 | st= csp_srv_begin(vb,(const void*)rrp); if (st) return st; |
401c256a | 1108 | return csp_domain(vb,rrp->host); |
1109 | } | |
1110 | ||
1111 | static adns_status cs_srvha(vbuf *vb, const void *datap) { | |
1112 | const adns_rr_srvha *rrp= datap; | |
1113 | adns_status st; | |
1114 | ||
0e45654b | 1115 | st= csp_srv_begin(vb,(const void*)datap); if (st) return st; |
401c256a | 1116 | return csp_hostaddr(vb,&rrp->ha); |
1117 | } | |
1118 | ||
042b0909 | 1119 | static void postsort_srv(adns_state ads, void *array, int nrrs,int rrsz, |
d24e2a7e | 1120 | const struct typeinfo *typei) { |
0e45654b | 1121 | /* we treat everything in the array as if it were an adns_rr_srvha |
1122 | * even though the array might be of adns_rr_srvraw. That's OK | |
1123 | * because they have the same prefix, which is all we access. | |
042b0909 | 1124 | * We use rrsz, too, rather than naive array indexing, of course. |
0e45654b | 1125 | */ |
1126 | char *workbegin, *workend, *search, *arrayend; | |
1127 | const adns_rr_srvha *rr; | |
1128 | union { adns_rr_srvha ha; adns_rr_srvraw raw; } rrtmp; | |
1129 | int cpriority, totalweight, runtotal; | |
1130 | long randval; | |
1131 | ||
042b0909 MW |
1132 | assert(rrsz <= sizeof(rrtmp)); |
1133 | for (workbegin= array, arrayend= workbegin + rrsz * nrrs; | |
0e45654b | 1134 | workbegin < arrayend; |
1135 | workbegin= workend) { | |
1136 | cpriority= (rr=(void*)workbegin)->priority; | |
1137 | ||
1138 | for (workend= workbegin, totalweight= 0; | |
1139 | workend < arrayend && (rr=(void*)workend)->priority == cpriority; | |
042b0909 | 1140 | workend += rrsz) { |
0e45654b | 1141 | totalweight += rr->weight; |
0e45654b | 1142 | } |
1143 | ||
1144 | /* Now workbegin..(workend-1) incl. are exactly all of the RRs of | |
1145 | * cpriority. From now on, workbegin points to the `remaining' | |
1146 | * records: we select one record at a time (RFC2782 `Usage rules' | |
1147 | * and `Format of the SRV RR' subsection `Weight') to place at | |
1148 | * workbegin (swapping with the one that was there, and then | |
1149 | * advance workbegin. */ | |
1150 | for (; | |
042b0909 MW |
1151 | workbegin + rrsz < workend; /* don't bother if just one */ |
1152 | workbegin += rrsz) { | |
0e45654b | 1153 | |
1154 | randval= nrand48(ads->rand48xsubi); | |
1155 | randval %= (totalweight + 1); | |
0e45654b | 1156 | /* makes it into 0..totalweight inclusive; with 2^10 RRs, |
1157 | * totalweight must be <= 2^26 so probability nonuniformity is | |
1158 | * no worse than 1 in 2^(31-26) ie 1 in 2^5, ie | |
1159 | * abs(log(P_intended(RR_i) / P_actual(RR_i)) <= log(2^-5). | |
1160 | */ | |
1161 | ||
1162 | for (search=workbegin, runtotal=0; | |
1163 | (runtotal += (rr=(void*)search)->weight) < randval; | |
042b0909 | 1164 | search += rrsz); |
0e45654b | 1165 | assert(search < arrayend); |
1166 | totalweight -= rr->weight; | |
1167 | if (search != workbegin) { | |
042b0909 MW |
1168 | memcpy(&rrtmp, workbegin, rrsz); |
1169 | memcpy(workbegin, search, rrsz); | |
1170 | memcpy(search, &rrtmp, rrsz); | |
0e45654b | 1171 | } |
1172 | } | |
1173 | } | |
d24e2a7e | 1174 | /* tests: |
1175 | * dig -t srv _srv._tcp.test.iwj.relativity.greenend.org.uk. | |
1176 | * ./adnshost_s -t srv- _sip._udp.voip.net.cam.ac.uk. | |
1177 | * ./adnshost_s -t srv- _jabber._tcp.jabber.org | |
1178 | */ | |
1179 | } | |
1180 | ||
d19b03d0 | 1181 | /* |
2c6eb096 | 1182 | * _byteblock (mf) |
1183 | */ | |
1184 | ||
1185 | static void mf_byteblock(adns_query qu, void *datap) { | |
1186 | adns_rr_byteblock *rrp= datap; | |
1187 | void *bytes= rrp->data; | |
1188 | adns__makefinal_block(qu,&bytes,rrp->len); | |
1189 | rrp->data= bytes; | |
1190 | } | |
1191 | ||
1192 | /* | |
1193 | * _opaque (pa,cs) | |
1194 | */ | |
1195 | ||
1196 | static adns_status pa_opaque(const parseinfo *pai, int cbyte, | |
1197 | int max, void *datap) { | |
1198 | adns_rr_byteblock *rrp= datap; | |
1199 | ||
1200 | rrp->len= max - cbyte; | |
1201 | rrp->data= adns__alloc_interim(pai->qu, rrp->len); | |
1202 | if (!rrp->data) R_NOMEM; | |
1203 | memcpy(rrp->data, pai->dgram + cbyte, rrp->len); | |
1204 | return adns_s_ok; | |
1205 | } | |
1206 | ||
1207 | static adns_status cs_opaque(vbuf *vb, const void *datap) { | |
1208 | const adns_rr_byteblock *rrp= datap; | |
1209 | char buf[10]; | |
1210 | int l; | |
1211 | unsigned char *p; | |
1212 | ||
1213 | sprintf(buf,"\\# %d",rrp->len); | |
1214 | CSP_ADDSTR(buf); | |
1215 | ||
1216 | for (l= rrp->len, p= rrp->data; | |
1217 | l>=4; | |
1218 | l -= 4, p += 4) { | |
1219 | sprintf(buf," %02x%02x%02x%02x",p[0],p[1],p[2],p[3]); | |
1220 | CSP_ADDSTR(buf); | |
1221 | } | |
1222 | for (; | |
1223 | l>0; | |
1224 | l--, p++) { | |
1225 | sprintf(buf," %02x",*p); | |
1226 | CSP_ADDSTR(buf); | |
1227 | } | |
1228 | return adns_s_ok; | |
1229 | } | |
1230 | ||
1231 | /* | |
eb81d633 | 1232 | * _flat (mf) |
1233 | */ | |
1234 | ||
ffbda80c | 1235 | static void mf_flat(adns_query qu, void *data) { } |
1236 | ||
eb81d633 | 1237 | /* |
1238 | * Now the table. | |
1239 | */ | |
1240 | ||
e062dcae | 1241 | #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member)) |
86e7b8d9 | 1242 | |
c5fd1fbb | 1243 | #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \ |
d24b603f | 1244 | { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_##memb, \ |
c5fd1fbb | 1245 | GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \ |
042b0909 | 1246 | adns__ckl_hostname, 0, adns__getrrsz_default, CDR(__VA_ARGS__) } |
c5fd1fbb | 1247 | #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer,/*printer*/...) \ |
d24b603f | 1248 | { adns_r_##code&adns_rrt_reprmask, rrt,fmt,TYPESZ_M(memb), mf_flat, \ |
c5fd1fbb | 1249 | GLUE(cs_, CAR(__VA_ARGS__)),pa_##parser,di_##comparer, \ |
042b0909 | 1250 | adns__ckl_hostname, 0, adns__getrrsz_default, CDR(__VA_ARGS__) } |
c5fd1fbb MW |
1251 | |
1252 | #define di_0 0 | |
98a3f706 | 1253 | |
1254 | static const typeinfo typeinfos[] = { | |
eb81d633 | 1255 | /* Must be in ascending order of rrtype ! */ |
609133ee | 1256 | /* mem-mgmt code rrt fmt member parser comparer printer */ |
1257 | ||
c5fd1fbb MW |
1258 | FLAT_TYPE(a, "A", 0, inaddr, inaddr, inaddr,inaddr ), |
1259 | DEEP_TYPE(ns_raw, "NS", "raw",str, host_raw,0, domain ), | |
1260 | DEEP_TYPE(cname, "CNAME", 0, str, dom_raw, 0, domain ), | |
1261 | DEEP_TYPE(soa_raw,"SOA", "raw",soa, soa, 0, soa ), | |
1262 | DEEP_TYPE(ptr_raw,"PTR", "raw",str, host_raw,0, domain ), | |
1263 | DEEP_TYPE(hinfo, "HINFO", 0, intstrpair,hinfo, 0, hinfo ), | |
1264 | DEEP_TYPE(mx_raw, "MX", "raw",intstr, mx_raw, mx_raw,inthost ), | |
1265 | DEEP_TYPE(txt, "TXT", 0, manyistr, txt, 0, txt ), | |
1266 | DEEP_TYPE(rp_raw, "RP", "raw",strpair, rp, 0, rp ), | |
1267 | DEEP_TYPE(srv_raw,"SRV", "raw",srvraw , srvraw, srv, srvraw, | |
e8e5aeac | 1268 | .checklabel= ckl_srv, .postsort= postsort_srv), |
c5fd1fbb | 1269 | |
b0a32b17 MW |
1270 | FLAT_TYPE(addr, "A", "addr", addr, addr, addr, addr, |
1271 | .getrrsz= gsz_addr), | |
c5fd1fbb | 1272 | DEEP_TYPE(ns, "NS", "+addr",hostaddr, hostaddr,hostaddr,hostaddr ), |
938b0228 MW |
1273 | DEEP_TYPE(ptr, "PTR","checked",str, ptr, 0, domain, |
1274 | .checklabel= ckl_ptr), | |
c5fd1fbb MW |
1275 | DEEP_TYPE(mx, "MX", "+addr",inthostaddr,mx, mx, inthostaddr, ), |
1276 | DEEP_TYPE(srv, "SRV","+addr",srvha, srvha, srv, srvha, | |
e8e5aeac | 1277 | .checklabel= ckl_srv, .postsort= postsort_srv), |
c5fd1fbb MW |
1278 | |
1279 | DEEP_TYPE(soa, "SOA","822", soa, soa, 0, soa ), | |
1280 | DEEP_TYPE(rp, "RP", "822", strpair, rp, 0, rp ), | |
98a3f706 | 1281 | }; |
1282 | ||
2c6eb096 | 1283 | static const typeinfo typeinfo_unknown= |
c5fd1fbb | 1284 | DEEP_TYPE(unknown,0, "unknown",byteblock,opaque, 0, opaque ); |
2c6eb096 | 1285 | |
f759e52e | 1286 | const typeinfo *adns__findtype(adns_rrtype type) { |
1287 | const typeinfo *begin, *end, *mid; | |
98a3f706 | 1288 | |
2c6eb096 | 1289 | if (type & adns_r_unknown) return &typeinfo_unknown; |
d24b603f | 1290 | type &= adns_rrt_reprmask; |
2c6eb096 | 1291 | |
98a3f706 | 1292 | begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo)); |
1293 | ||
1294 | while (begin < end) { | |
1295 | mid= begin + ((end-begin)>>1); | |
2c6eb096 | 1296 | if (mid->typekey == type) return mid; |
1297 | if (type > mid->typekey) begin= mid+1; | |
98a3f706 | 1298 | else end= mid; |
1299 | } | |
1300 | return 0; | |
1301 | } |